diff --git a/app/Node/JsonNodeRepository.php b/app/Node/JsonNodeRepository.php
new file mode 100644
index 0000000..a466bc0
--- /dev/null
+++ b/app/Node/JsonNodeRepository.php
@@ -0,0 +1,129 @@
+<?php
+
+namespace App\Node;
+
+use App\Node\Node;
+use App\Node\CreateNodeDto;
+use App\Node\NodeRepository;
+use App\Text\TextRepository;
+
+class JsonNodeRepository implements NodeRepository
+{
+    private string $filePath;
+
+    public function __construct(
+        private TextRepository $textRepository,
+    ) {
+        $this->filePath = __DIR__.'/../../data/nodes.json';
+    }
+
+    public function create(CreateNodeDto $dto): Node
+    {
+        $nodes = $this->readNodes();
+        $id = $this->getNextId($nodes);
+
+        $nodes[] = [
+            'id' => $id,
+            'title' => $dto->title,
+            'textId' => $dto->text->getId(),
+            'parentNodeId' => $dto->parentNode?->getId(),
+        ];
+
+        $this->writeNodes($nodes);
+
+        return new Node(
+            id: $id,
+            title: $dto->title,
+            text: $dto->text,
+            parentNode: $dto->parentNode,
+        );
+    }
+
+    public function find(int $id): ?Node
+    {
+        $nodes = $this->readNodes();
+
+        foreach ($nodes as $data) {
+            if ($data['id'] === $id) {
+                return $this->hydrateNode($data, $nodes);
+            }
+        }
+
+        return null;
+    }
+
+    /**
+     * @return Node[]
+     */
+    public function findByTextId(int $id): array
+    {
+        $nodes = $this->readNodes();
+
+        $matching = array_filter(
+            $nodes,
+            fn(array $data) => $data['textId'] === $id
+        );
+
+        return array_values(array_map(
+            fn(array $data) => $this->hydrateNode($data, $nodes),
+            $matching
+        ));
+    }
+
+    private function hydrateNode(array $data, array $allNodes): Node
+    {
+        $text = $this->textRepository->find($data['textId']);
+
+        $parentNode = null;
+        if ($data['parentNodeId'] !== null) {
+            foreach ($allNodes as $parentData) {
+                if ($parentData['id'] === $data['parentNodeId']) {
+                    $parentNode = $this->hydrateNode($parentData, $allNodes);
+                    break;
+                }
+            }
+        }
+
+        return new Node(
+            id: $data['id'],
+            title: $data['title'],
+            text: $text,
+            parentNode: $parentNode,
+        );
+    }
+
+    private function readNodes(): array
+    {
+        if (!file_exists($this->filePath)) {
+            return [];
+        }
+
+        $content = file_get_contents($this->filePath);
+
+        return json_decode($content, true) ?? [];
+    }
+
+    private function writeNodes(array $nodes): void
+    {
+        file_put_contents(
+            $this->filePath,
+            json_encode($nodes, JSON_PRETTY_PRINT)
+        );
+    }
+
+    private function getNextId(array $nodes): int
+    {
+        if (empty($nodes)) {
+            return 1;
+        }
+
+        $maxId = 0;
+        foreach ($nodes as $node) {
+            if ($node['id'] > $maxId) {
+                $maxId = $node['id'];
+            }
+        }
+
+        return $maxId + 1;
+    }
+}